(19)

(11)

EP 0 891 466 A1

(12)

(43) Date of publication: 20.01.1999 Bulletin 1999/03 (21) Application number: 97915755.0 (22) Date of filing: 10.04.1997

(51) International Patent Classification (IPC):  E06B 1/ 52( . ) E06B 5/ 16( . ) E06B 3/ 58( . ) (86) International application number: PCT/NL1997/000184 (87) International publication number: WO 1997/038201 (16.10.1997 Gazette 1997/44)

(84) Designated Contracting States: AT BE CH DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE (30) Priority: 10.04.1996 NL 19961002837 (71) Applicant: Polynorm N.V. 3751 JL Bunschoten (NL)	(72) Inventors: HILHORST, Jan, Eduard NL-6714 BP Ede (NL) VAN VULPEN, Gijsbertus, Jan NL-1214 ED Hilversum (NL) (74) Representative: Land, Addick Adrianus Gosling  Arnold & Siedsma, Advocaten en Octrooigemachtigden, Sweelinckplein 1 2517 GK Den Haag 2517 GK Den Haag (NL)